An introduction to graph databases. From graph theory, through the history ofcomputing and how it affected database design, to why relational databasesaren't about relations. Next, a look how diverse is the current graph databasemarket and what obvious and not so obvious problems are solved by graphs. Ashort introduction to Neo4j's query language, Cypher, will show the mainconcepts of querying graph data. Then, by use of the same datasets in bothrelational and graph databases will compare syntax clarity and databaseperformance.